Chesterfield moved into the play-off places by sending Lincoln crashing to only a second defeat in eight games. Goalkeeper Alan Marriott was Lincoln's best player but he was left exposed when Lloyd Kerry opened the scoring.
Jack Lester drove in a fine individual goal to make it two before Ben Wright reduced the deficit after a mix-up.
Peter Leven restored Chesterfield's two-goal advantage, though, and Jamie Ward broke away 10 minutes from time to set up Kerry for the fourth.
Chesterfield: Roche, Picken, Kovacs, Downes, Hartley, Lowry, Kerry, Leven (Cooper 87), Winter, Dowson (Ward 67), Lester (Fletcher 67).
Subs Not Used: O'Hare, Niven.
Goals: Kerry 39, Lester 52, Leven 59, Kerry 81.
Lincoln City: Marriott, Green, Brown, Hone, Beevers, N'Guessan, Kerr, Clarke, Dodds, Forrester (Warlow 74), John-Lewis (Wright 8).
Subs Not Used: Moses, Duffy, Morfaw.
Goals: Wright 58.
Att: 4,352
Ref: Kevin Wright (Cambridgeshire).
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